Chemical Bonding — Test Answers

1

Free Preview

Which pair of atoms would form a covalent bond ?

A

calcium Ca and bromine Br

B

cesium Cs and nitrogen cap n

C

rubidium Rb and sulfur cap s

D

oxygen cap o and chlorine Cl

2

Free Preview

What do the broken lines connected to hydrogen atoms represent in this diagram?

A

the strongest intermolecular forces

B

the weakest intramolecular forces

C

the strongest intramolecular forces

D

the weakest intermolecular forces

3

What do the broken lines connected to hydrogen atoms represent in this diagram?

A

the weakest intramolecular forces

B

the strongest intermolecular forces

C

the weakest intermolecular forces

D

the strongest intramolecular forces

4

The incomplete table shows selected characteristics of different types of bonds. Row Bond Cause Physical property of compound 1 ? Electron sharing among many atoms Ductile 2 ? Electron sharing between two atoms Brittle 3 ? ? Brittle What type of bond is most likely being represented in row 1?

A

covalent

B

ionic

C

ion-dipole

D

metallic

5

Which statement best describes the effect of low ionization energies and low electronegativities on metallic bonding?

A

The valence electrons break free of the crystals.

B

The valence electrons move closer to the nuclei.

C

The valence electrons are easily delocalized.

D

The valence electrons stay in a single orbital.

6

Which is the Lewis structure for cap h sub 3 PO sub 4 ?

A

Image with description A chemical structure diagram shows a central phosphorus (P) atom. Above the P atom, a single bond connects to a hydrogen (H) atom. To the left of the P atom, a single bond connects to an oxygen (O) atom. This oxygen atom has two dots above it and two dots below it, and is single-bonded to a hydrogen (H) atom to its left. To the right of the P atom, a single bond connects to an oxygen (O) atom. This oxygen atom has two dots above it and two dots below it, and is single-bonded to a hydrogen (H) atom to its right. Below the P atom, a single bond connects to an oxygen (O) atom. This oxygen atom has two dots to its left, two dots to its right and two dots below it.

B

Image with description A chemical structure diagram shows a central phosphorus (P) atom. Above the P atom, a single bond connects to an oxygen (O) atom. This oxygen atom has two dots above it, and is single-bonded to a hydrogen (H) atom to its left and another hydrogen (H) atom to its right. To the left of the P atom, a single bond connects to an oxygen (O) atom. This oxygen atom has two dots above it and two dots below it. To the right of the P atom, a single bond connects to an oxygen (O) atom. This oxygen atom has two dots above it and two dots below it. Below the P atom, a single bond connects to an oxygen (O) atom. This oxygen atom has two dots to its left and two dots to its right, and is single-bonded to a hydrogen (H) atom below it.

C

Image with description A chemical structure diagram shows a central phosphorus (P) atom. Above the P atom, a double bond connects to an oxygen (O) atom. This oxygen atom has two dots above it, two dots to its left and two dots to its right. To the left of the P atom, a single bond connects to an oxygen (O) atom. This oxygen atom has two dots above it and two dots below it. To the left of this oxygen atom, a single bond connects to a hydrogen (H) atom. To the right of the P atom, a single bond connects to an oxygen (O) atom. This oxygen atom has two dots above it and two dots below it. To the right of this oxygen atom, a single bond connects to a hydrogen (H) atom.

D

Image with description A chemical structure diagram shows a central phosphorus (P) atom. Above the P atom, a single bond connects to an oxygen (O) atom. This oxygen atom has two dots above it, and is single-bonded to a hydrogen (H) atom to its left and another hydrogen (H) atom to its right. To the left of the P atom, a single bond connects to an oxygen (O) atom. This oxygen atom has two dots above it and two dots below it. To the right of the P atom, a single bond connects to an oxygen (O) atom. This oxygen atom has two dots above it and two dots below it. Below the P atom, a single bond connects to an oxygen (O) atom. This oxygen atom has two dots to its left and two dots to its right, and is single-bonded to a hydrogen (H) atom below it.

7

When applied to a dish, soap makes grease soluble in water. Which explanation correctly supports the role of intermolecular forces in this common observation?

A

The polar soap molecule attaches itself to a nonpolar soap molecule.

B

The polar soap molecule attaches itself to the dish.

C

The nonpolar end of a soap molecule attaches itself to water.

D

The nonpolar end of a soap molecule attaches itself to grease.

8

Which of the compounds would be expected to have the strongest ionic bonds?

A

the compound that has the smallest ions with the least charge

B

the compound that has the smallest ions with the greatest charge

C

the compound that has the largest ions with the least charge

D

the compound that has the largest ions with the greatest charge

9

Which compound has the highest melting point?

A

cap c sub 8 cap h sub 18

B

cap h sub 2 cap o

C

cap c sub 12 cap h sub 22 cap o sub 11

D

Al sub 2 open paren CO sub 3 close paren sub 3

10

Which refers to a macromolecule that forms as a result of the joining of multiple monomers?

A

nucleic acid

B

amino acid

C

glucose

D

polymer

11

Which are long chains formed by the process of polymerization?

A

ethylenes

B

DNA strands

C

subunits

D

monomers

12

Which of these is a property of a substance that is composed of atoms that are held together by ionic bonds?

A

It has a low melting point.

B

It conducts electricity when in solid form.

C

It conducts electricity when it is dissolved in water.

D

It can be shaped into wires.

13

Which statement is true about ionic compounds?

A

Ionic compounds are very easy to bend.

B

Ionic compounds have varying solubilities in water.

C

Ionic compounds have very low melting points.

D

Solid ionic compounds are good conductors of electricity.

14

The incomplete table shows selected properties of compounds that have ionic, covalent, or metallic bonds. Row Substance Type of bond Likely property 1 KCl ? Brittle 2 ? Covalent Does not conduct electricity 3 ? ? Malleable Which substance would be most suitable for row 3?

A

nitrogen open paren cap n sub 2 close paren

B

sodium chloride NaCl

C

silver Ag

D

propane open paren cap c sub 3 cap h sub 8 close paren

15

What is the chemical formula for zinc (II) phosphate?

A

Zn times open paren PO sub 4 close paren

B

Zn open paren NO sub 3 close paren sub 2

C

Zn sub 3 open paren PO sub 4 close paren sub 2

D

Zn sub 3 cap p sub 2

16

Among the intermolecular forces, which forces are typically the weakest?

A

London dispersion forces

B

hydrogen bonds

C

dipole-dipole interactions

D

dipole-induced dipole interactions

17

Which formula represents the compound commonly known as phosphine with IUPAC name phosphorus trihydride?

A

PH

B

PH sub 2

C

PH sub 3

D

PH sub 4

18

An element has six valence electrons available for bonding. Which group of the periodic table does this element most likely belong to?

A

group 2

B

group 18

C

group 4

D

group 16

19

Which reason best explains why metals are shiny?

A

because their valence electrons reflect light

B

because their valence electrons absorb light

C

because their valence electrons oscillate between bands

D

because their valence electrons move to higher energy levels

20

Which element is likely to be the most brittle?

A

platinum

B

zinc

C

selenium

D

cobalt

Chemical Bonding — Test Answers

More from this Course

TRY EDGENUITY HACKS